Click the "Add Content" tab to add content to the bottom of the page.

Click the "+" at the bottom of a section to add new content at the bottom of that section.

Click the "+^" button to the right of items to add new content above that item.

Click the "+" or "+^" button to the right of an item to add a section break above that item.

Click the "+" or "+^" button to the right of an item to add a column break above that item.